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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1-3 days






2. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






3. Milk is 15% ________ and 85% __________.






4. Depository for semen during insemination. where urine leaves the body






5. What makes the milk flow through the mammary glands?






6. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






7. (male) pushes the testes outward toward the legs for a cool-down off of the body






8. Scar tissue plugs up chambers of udder






9. Produce testosterone. located between the seminiferous tubules






10. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






11. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






12. 1. brain function - 2. blood flow - 3. willing female






13. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






14. 19-23 (21) days






15. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






16. When are dairy cattle dehorned?






17. 26 hours after estrus begins






18. 114 days






19. Prevent the cow from getting an infection from the calve






20. To remove/separate testicles from animal's body before animal reaches puberty






21. Implies the amount of estrogen production






22. Microscopic - make sure not sterile - very few bulls are actually tested






23. Important 'landmark' during palpation






24. 30-38 hours after estrus cycle begins






25. Animals which have only one estrous cycle (ex: dog - fox)






26. Provide nourishment for the developing sperm






27. (LH) stimulates the Leydig cells to produce testosterone






28. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






29. 10-37 (21) days






30. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






31. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






32. 30 hours after estrus begins






33. (LH) stimulates the Leydig cells to produce testosterone






34. Front feet and head first. (except for hogs and dogs)






35. Actual heat cycle (period)






36. 24 hours before end of estrus cycle






37. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






38. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






39. (LH) causes female's egg to break (her period)






40. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






41. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






42. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






43. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






44. What makes the milk flow through the mammary glands?






45. Urinary calculi.






46. Urinary calculi.






47. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






48. (male) pushes the testes upward toward the body for warmth or protection






49. ~305 days (altough often longer due to breeding difficulties)






50. When are steers and heifers weaned from bottle feeding?